Auricular apparatus



G. L. .IONASON. AURICULAR APPARATUS. APFLICATJON FILED FEB. 28, 1920.

Pmtenmd Nov. 21, 119220 Patented Nov. 21, 1922.

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PATENT @FFHCE.

AURICULAR APPARATUS.

( Application filed February 28, 1920. Serial Nb. 362,174.

To all whom it may concern:

Be it' known that I, GUs'rAr LEONARD JoNAsoN, a subject of the King ofSweden, residing at Stockholm, Sweden, have invented new and usefulImprovements in Auricular Apparatus, of which the followingris aspecification.

he present invention relates to an apparatus for the transmission ofarticulate sounds, in which the electric current in the magnet-windingsof electro-magnets is varied by the articulate sounds, which are to betransmitted, and the electro-magnets act upon and cause oscillations ofmembers. The characteristic features of the invention consist in thatthe said members, in addition to the" fact that they have free-edgeparts, are provided with elastic supports in order to avoid self-tone,.nodes, secondary tones and disadvantageous sympathy." Further theelastic supports can be wedge-shaped in order to give a wedge-shaped andcontrolable space between the poles and armatures and thus to facilitatethe maximum oscillation amplitude of the members. Finally the memberscan support theelectro-magnets and yokes inclosing them in such a waythat, when the apparatus is placed upon a part of the human body fortransmitting the oscillations of the members through the osseousstructure to the auditory nerves, the yokes prevent contact betweenmagnet-poles and armatures, should the pressure of the'apparatus uponsaid part of the human body exceed a certain value. It should be notedthat the magnet-poles and the armatures never may be brought in contactwith each other during the working of the apparatus .and thus the yokesare of great importance when it is desired to allow the members to actdirectly upon a part of the human body.

or upon a covering of the same, which does not prevent the transmissinof the oscillations to the osseous structure, because,should as for thetransmission of such sounds through the osseous structure. The formerapparatus up'to date have been 0O11S1dBr= ably improved as to theincreasing of the sound, but nevertheless they are unpracticable owingto enervating sonorous color, self-tones -and secondary tones of manykinds. The latter apparatus are not even known in medical literature aspracticable for experiments. It is a scientific fact that the effect ofthe transmission through the osseous structure is 2.5 times greater thanthe effect of the transmission through the air. The apparatus accordingto the present invention produces sound waves, which make the apparatusmore effective than In the form shown in Fig. 1, 1 is an apparatus box,which in a first compartment 2 has a microphone 3 for receiving soundsof speech, with a resistance 4 and transformer 5, in a secondcompartment 6 a battery 7, and in a third compartment 8 a system ofarticulating tongues 9, or the like, with electromagnets 10, 10 10 themicrophone and the electro-magnetic device being coupled in such a waythat the electro-magnets are acted on by the microphone current, whichhave on the tongues 9 armatures 11, 11 11 arranged in the form of metalcoverings. The shape, dimensions and material of the tongues may beselected according to circumstances. A suitable material is wood, forexample poplar. The tongues or members 9 have free edge-parts, i. e.,they do not form membranes as in certain earlier proposed apparatus, inwhich the circular edges ofthe membranes are fixed all around.Oscillating members with free edge arts have, it is true, been earlierproposedfi from these known members the member 9 in addition to thishave elastic supports. So

forinstance the part or wooden rod 13 passes through a packlng 1 2 inthewall of the box, said packing forming an elastic support. In additionto this the wooden rod 13 passes through a packing 14 forming also ut indistinction an elastic support for the same and having a free end 15,fashion.

preferably tapering in wedge-.

Another wooden rod 18, parallel to the wooden rod 13, and of similarshape to the latter, is firmly united by a cross piece 17 to the woodenrod 13, at 16, closer to the packing let than to the packing 12. Thewooden rod 18 is by means of pivot 18 rotatably journalled between thebranches of a yoke 20, adjustably fixed on a sound box 19 for modifyingthe self-tone. When one speaks in the microphone, the electro-magnets10, 10 10 are affected in such wise that they exercise a moreor lesspowerful attraction on their armatures 11, 11 11 and thereby set thesystem of tongues 9 in articulating oscillations. In order to render thelatter as effective as possible, the air is pumped'through an opening21, provided witha valve,.out of the compartment 8, which for thispurpose must be airtight. With a view to improved efiiciency, theelectro-magnets 10, 10 10 should have their;

poles somewhat obliquelyinclined to the normal longitudinaldirection ofthe wooden rods 13, 18. This oblique position is determined by themaximum amplitude of the wooden rods,

as is illustrated on a'larger scale in Fig. 2.

For this purpose the eleetro-magnets should be adjustable in one way oranother (not shown). The electro-magnet 10 is shown provided with anelastic impingement cushion 22, which by the adjustment of theelectro-magnet can be carried closer to or drawn further away from thewooden rod 13. 'Atits end outside the apparatus box, the wooden .rod 13is connected, with a flexible, elongated member 23 (for instance, awire), which in turn is connected with a pincenez 24. If the latter isplaced on the nose, the articulating oscillations of the tongue aretransmitted through the member 23 and the pincenez 24 and the nose tothe osseous'structure, and give clear perceptions of articulatingsounds. The member 23 need not be connected with the outer end. of thewooden rod 13, but may be connected with it at other places. 'Thus, fgrexample, one may confine oneself to one wooden rod only, and connect thesaid members 23 with its inner, free, swinging en'd. Instead ofterminating in a pincenez, the member 23 may terminate in an opera glassor the like or in-a piece in which the teeth are set, in which case thearticulating oscillations of the tongues are transmitted through theteeth. 2

According to the form shown in Fig; 3, the tongues form an annularribbon 31, arranged so as to be placed around the forehead, or head. Anumber of electro-magnets 10 are carried by this ribbon. In accordancewith the form shown, the electro-magnets are retained on the, ribbon bymeans of yokes 32 fitted to the latter, and by elastic wedges 33 drivenin between the electro-magnet and the ribbon. The lower edge of theribbon is.v

provided, opposite to the electromagnet poles,

the tongues, or of the ribbon, direct from the ribbon to the head andits osseous structure. The elastic wedges 33 form the above mentionedwedge-shaped supports. The yokes 32 form the above named yokes whichprevent contact between magnet-poles and armatures should the pressureof the apparatus upon the part in question of the human body exceed acertain value. For, if a great pressure be exerted upon the ribbon 31 orupon the yoke-32 the ends of the branches of said yokes 32 will yieldoutward and extend the part of the ribbon between said branches,-so thatthe armature will be held from the electromagnet 10 The apparatus showninFig. 3 is combined with a telephone apparatus in order simultaneouslywiththe transmission of the articulating sounds through the osseousstructure to obtain a transmission of the latter in the usual mannerthrough the auditory canal. As is indicated by Fig. 3 the receivers 3for this telephone are suspended or fastened on the ribbon. Thesefastenings are of such a nature that they allow of the receivers 34.being approached to pr moved away from the ears. An apparatus arrangedin accordance with the same principle as the ribbon may also beconstructed so as to be placed for example on the nape under the clothesto be *applied to an opera glass etc.

means controlled by articulate sounds forvarying the. current in themagnet windings of the electromagnets. v

2. Apparatus according to claim 1, the

elastic supports being wedge-shaped thereby to provide a. wedge-shaped,controllable space between the poles and armatures of theelectromagnets'. I

3. Apparatus according to claim 1, yokes enclosing said electromagnets,said oscillatable members supporting said electromagnets and yokes,whereby the apparatus may be-placed on a portion of the human bodyWithout causing contact between the 10 magnet poles and armatures.

L In testimony whereof I have signed my name to this specification.

GUSTAF LEONARD JONASON.

